package IO流案例;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Comparator;
import java.util.Scanner;
import java.util.TreeSet;

public class 集合到文件数据排序改进版 {
    public static void main(String[] args) throws IOException {
        /*创建TreeSet集合，通过比较器排序进行排序*/
        TreeSet<Student> ts = new TreeSet<>(new Comparator<Student>() {
            @Override
            public int compare(Student s1, Student s2) {
                /*成绩总分从高到低*/
                int num = s2.getSum() - s1.getSum();
                /*次要条件*/
                int num2 = num == 0 ? s1.getChinese() - s2.getChinese() : num;
                int num3 = num2 == 0 ? s1.getMath() - s2.getMath() : num2;
                int num4 = num3 == 0 ? s1.getName().compareTo(s2.getName()) : num3;
                return num4;
            }
        });
        /*键盘录入学生数据*/
        for (int i = 0; i < 3; i++) {
            Scanner sc = new Scanner(System.in);
            System.out.println("请录入第"+(i+1)+"个学生信息:");
            System.out.println("姓名:");
            String name = sc.nextLine();
            System.out.println("语文成绩:");
            int chinese = sc.nextInt();
            System.out.println("数学成绩:");
            int math = sc.nextInt();
            System.out.println("英语成绩:");
            int english = sc.nextInt();
            /*创建学生对象，把键盘录入的数据对应赋值给学生对象的成员变量*/
            Student s = new Student();
            s.setName(name);
            s.setChinese(chinese);
            s.setEnglish(english);
            s.setMath(math);
            /*把学生对象添加到TreeSet集合*/
            ts.add(s);
        }
        /*创建字符缓冲输出流对象*/
        BufferedWriter bw = new BufferedWriter(new FileWriter("D:\\111\\222.txt"));
        /*遍历集合，得到每一个学生对象*/
        for (Student s:ts) {
            /*把学生对象的数据拼接成指定格式的字符串*/
            /*格式：姓名，语文成绩，数学成绩，英语成绩*/
            StringBuilder sb = new StringBuilder();
            sb.append(s.getName()).append(",").append(s.getChinese()).append(",").
                    append(",").append(s.getMath()).append(",").append(s.getEnglish()).
                    append(",").append(s.getSum());
            /*调用字符缓冲输出流的对象写数据*/
            bw.write(sb.toString());
            bw.newLine();
            bw.flush();
        }
        /*释放资源*/
        bw.close();
    }
}
/*
* 学生类
* */
class Student{
    private String name;
    private int Chinese;
    private int math;
    private int english;
    public Student(String name, int chinese, int math, int english) {
        this.name = name;
        Chinese = chinese;
        this.math = math;
        this.english = english;
    }
    public Student(){
        super();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getChinese() {
        return Chinese;
    }

    public void setChinese(int chinese) {
        Chinese = chinese;
    }

    public int getMath() {
        return math;
    }

    public void setMath(int math) {
        this.math = math;
    }

    public int getEnglish() {
        return english;
    }

    public void setEnglish(int english) {
        this.english = english;
    }
    public int getSum(){
        return this.Chinese+this.math+this.english;
    }
}